Problem preview
F-LE.4 Warmup M3-029-A13-V01

Use logarithms to solve exponential equations of the form ab^(ct)=d and evaluate with technology.

Solve an exponential equation by isolating the exponential factor and taking logarithms

Problem

Describe the most efficient method for solving \(2^{x~+~1}~=~64\) and justify why it applies.

Big Picture

What this problem is really about

Method comes before machinery here. Check whether the constant is an exact power of the base already present; if it is, rewrite both sides with that base and use one-to-one behavior to equate exponents. Logarithms remain a valid general method, but the common-base route is exact and more direct.

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Four variants of this problem type
Curriculum context
Course
Math III
Standard
F-LE.4
Category
Functions
Domain
Linear, Quadratic, and Exponential Models
Objective
Use logarithms to solve exponential equations of the form ab^(ct)=d and evaluate with technology.
Problem type
Solve an exponential equation by isolating the exponential factor and taking logarithms